最基本的知識點是This book is more expensive than that one。
多多少如何表達呢？比如
這本書是那本書的四倍長This book is four times longer than that one.
同理，
這本書比那本書貴十元錢This book is ten dollars more expensive than that one。
真心希望這個比較過程，對妳理解起來有幫助，希望采納哦！謝謝！